Charles btjrgon and harry



(N0 Model.)

c. & H. BURGON.I

ANIMAL SHEARS.

Patented Aug. 30, 1892.

TJNETED STATES PATENT FFICE CHARLES BURGON AND HARRY BURGON, OF MALIN BRIDGE, ENGLAND.

ANIMAL-SHEARS.

SPECIFICATION forming part of Letters Patent N0. 481,844, dated August SO, 1892.

Application filed Mary 5, 1892. Serial N0. 431,934. (N0 model.)

T0 all wh0m it may concern:

Be it known that we, CHARLES BURGON and HARRY BURGON, sheep-shear manufaeturers, 0f Malin Bridge, near Sheffield, in the connty of York, England, do hereby declare the nature of our in vention for Improx ernents in Apparatus for Shearing 0r Olipping Sheep er other Animals and in what manner the same is to be performed t0 be particularly deseribed ancl aseertainecl in an 1 by the f0l lowing statement.

This invention relates to instrumens for shearing 0r elipping sheep und other animals, such as are deseribed in the specification of a previous applieation f0r Letters Patent (lated the 5th day of Mareh, 1892, Serial N0. 423,941; and theimprovements consists, first, in an improved mode of mountingthe forked cross-head upon the vibrating 0r oseillating lever, by whieh the top cntters are driven, and of applying a spring t0 press the said eutters 011 the combplate with the necessary pressnre, and, secondly. in an improvecl coustruction of the pivotalaxis upon whieh said vibrating lever oseillates, whereby the werking loose of said axis, as heretofore made, is obviated. Aceording t0 the first improvement the forked cross-head is provided with two prongs onlyone near each end. Ib is Carried by a socket pivoting freely upon the 0scillating or vibrating lever, so that the pressure 0f the cross-head will be divided equally between the two prongs 0r limbs, which mus necessarily press upon the two ends Of the top cutter-plate With equal pressure, whereby an equal disoribution of the pressure on the top cutter-plate is insurecl. In eornbination with such loosely-pivoted forked cross-head a spring ocoupying the position 0f the center prong of the fork is mounted in the end 0f the vibrating lever, said spring being adapted '00 bear upon the top cutter-plate before the forked. cross-head. bears npon it, so thab the pressure is applied t0 the t0p cutters first through the mediu1n 0f the spring an(l then through the li1nbs 0f the forked cross-head, which may be macle t0 bear upon the cutters with a dead unyielding pressure. The spring is carried by a shank fitting in a socket in the end 0f the vibrating lever-arm and securecl by a cross-pin passed through both, the

pin projecting throngha slotin the socket of the forked cross-head. The end prongs of the erosshead engage with the top cutterplate in the usual way f0r the purpose of driving it.

The improvernent in the pivotal axis of the oseillating 0r vibrating lever consistS in forging a eentral stud solid with the rgcking baseplate, screw-threading it, then after placing the vibrating or oscillating lever in position panded so as t0 canse in to bind tightly in the sleeve without; injuring the screw-thread. The parts can only be dismounted by drilling 0ut; or otherwise removing the drif-pin; 0x, if desirecl, the hole may be expanded by a conieal drift- 0r punch without being permanently plugged bya pin.

Referenee is t0 be had t30 the accompanying drawing's, forming part 0f this speeification, wherein Figure 1 is a part longitudinal sectional elevation 0f so much et the 1nachine as is necessary t0 illustrate the improvementsand Fig. 2 is a plan of the Same.

'lhe san1eletters 0f referenee denooe like parts in both figures.

A is the lower cutter 0r 00ml) plate; B, the top cutter-plate; C, the vibrating or oscillating lever; D, its forkecl cross-head, and E the rocking baseplate carrying the pivotal axis of said lever. The erosshead D has two prongs d, Which bearon and embrace the ende of the top eutter-plate B and engage by sbuds in holes therein, as before. This cross-head has a central soeket D, fitting loese on the cylindrical en(l of the lever 0 and seeurecl thereon by a cross-pinf, whose ends are receivedin eircumferenti-al slotsfin the soeket D, so as to permib the free oseillation 0f the latter 011 the arm of lever O.

F is a spring pressing centrally on the top cutter-plate B, said spring being formed 011 a shank F, received in a socket in ehe end of 1ever O, in which ic is seoured by beingtraversed by the oross-pin f, before mentioned. The form of this spring and the leve1 0f its extremity With regard to oho prongs d 0f the fork is such that the major part 01: the pressure of the lever C on the top 011 tter-plate Bis applied through this spring. The spring being permanently fixed to the1ever C and prevented from turning its position with regard t0 the top cutter-plate B is invariable, while the fork I), pivoting freely on the 1ever O, is at ]iberty 110 adjust itself, so that the pressure 0f its two prongs d upon the top cntterplate shall be equal under all circmnstances and in all positions of the lever C. 'lhis freed0m 0f self-adj ustment is the more necessary, inasmuch as in order so insnre as efficient cutting action toward the extremities of their stroke as at ehe rniddle it is found in practice desirable to grind the upper surface 0f the comb-plat A with a Very slighu coneave cmvature in the transverse direction. The rocking base-plate Eis pivoted 011 a oross-pin e in the n1ain frame, as before, and has forged in onewith ita stud G,whieh is screw-threaded, as shown, and upon it is soiewed the sleeve H, after the Same has been fitted in the boss of lever O. The sleeve is 0f hardened steel. It has the head h to inelose the ball-bearings and hold the 1ever down. A centra1 hole is bored in the end 0f stud G, which is expanded (after the sleeve is screwed hard down on the base-plate E) by a taper drift-pin g, permanently 01 temporarily driven in.

In other respeets the machine is similar in construction and operation to that described in the specification 0f the previous patent hereinbefore referred to.

Having 110W particularly described and ascertained the natuyre of 0111 said invention and in what manner the same is t0 be performed, we declare that What we claim is 1. In the herein-described shearing or alipping maohine, the combination, with the vibrating 1ever, of a neutral sprin g bearing on the top outter-plate and caxried by a shank rigid1y fixed on the end of the said 1evor, and a forked cross-head ha.ving two prongs adapted to bear on and engage with tho ends of the top cutter-plate, and a central Socket pivoting freely on the end of the vibrating lever, as described.

2. The combination, With the vibrating 1ever spring-shank fibted therein, a.nd a forked cross-head and socket pivoting thereon, of a oross-pin traversing the springshank and vibrating lover and received in circun1ferential sl0ts in the cross-head Socket so as to uninta.in the conneetion 0f both the spring and crossixead with the 1ever while permitting the pivotal motion of the cross-head, as described.

In the herein-described shearing 01 alipping maehine, the eombination, with the rocking base-plate, of a stud forged integrally therewith anti of a sleeve screwed thereon and adapted t0 fit; in the boss of, and t0 form the upward bearing-surface for, the vibrating 1ever, as speoified.

4. The combination, With the screw-stud forged integra1ly with the rocking base-plate and with the sleeve screwing thereon, 0f a drift-pin forced int0 a hole in the end of the stand so as to expand the same, as specified.

Dated this 21st day of April, 1892.

CHARLES BURGON. HARRY BURGON. V\7itnesses:

WM. CLARK, 53 Ohcmcery Lama, London, Patent Agent.

T. V. KENNARD, 53 Ohancery Laue, London, Olerk. 

